Program to find the nth terms of its factorial(Level - Medium)

Program # 22: Program to find out nth factorial of given number

//Program to find the nth terms of its factorial(Level - Medium)

#include <iostream.h> 
#include <conio.h>

void main()

{

int i,n;

float long res,j,z; 
clrscr ();

cout<<"Enter any number you want to series = "; 
cin >> n;

res = 1;

z = 0;

for (i=1;i<=n;i++)

{

res = res*i; j = i/res;

z = z+j;

}

cout<<"1/1! + 2/2! + 3/3! + 4/4! +..... +n/n! = "<<z;

getch ();

}